CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVE-2021-32622
High (7.8) in matrix-react-sdk project matrix-react-sdk. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in matrix-react-sdk 3.21.0.
Matrix-React-SDK is a react-based SDK for inserting a Matrix chat/voip client into a web page. Before version 3.21.0, when uploading a file, the local file preview can lead to execution of scripts embedded in the uploaded file. This can only occur after several user interactions to open the preview in a separate tab. This only impacts the local user while in the process of uploading. It cannot be exploited remotely or by other users. This vulnerability is patched in version 3.21.0.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-434, CWE-74
- Published
- Modified
- Record from
- the NVD, synced
Affected
- matrix-react-sdk_project:matrix-react-sdk
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-8796-gc9j-63rv | npm | matrix-react-sdk | <3.21.0 | 3.21.0 |
| GHSA-cg57-p69r-3m7p | npm | matrix-react-sdk | <3.21.0 | 3.21.0 |